"In, you must go."
"What's in there?"
"Only what you take with you."
―Yoda and Luke Skywalker
I'm at a pretty massive convention. It's the sort of convention where different groups of people can occupy themselves for the duration, keeping to their own interests, and never see anyone outside that focused interest. I could do my thing, hang out only with people who do my thing, and still have plenty to do, but I can also dip into things with interesting titles (or walk into a room before a session on literature and behavioral economics starts, and then chicken out).This is the way many conventions are experienced, though we speak afterwards of having attended a convention as if it were one cohesive experience.
We do this all the time. It makes sense to us to talk about how amazing a restaurant is, despite only having one eaten one of many possible meals there. But there's a reason that restaurants offer options, rather than insisting on a prix fixe offering: Each customer arrives with their own appetite, and perhaps even dietary restrictions. So restaurants offer varied menus, with hopes that everyone can go home satisfied, and leave a positive review on Yelp — or at least that nobody vomits or goes into anaphylactic shock.